Locomotive with brake

The invention discloses a locomotive with a brake. The locomotive with the brake comprises a locomotive body, a front wheel and a rear wheel which are rotatably connected to the locomotive body and adrive mechanism. An output shaft of the drive mechanism is connected with the rear wheel, and the locomotive with the brake further comprises an air cylinder and the brake. The air cylinder is fixed to the middle portion of the locomotive body and located between the front wheel and the rear wheel. The air cylinder comprises a cavity body, a piston and a piston rod fixed to the piston, and the cavity body is divided into a first cavity and a second cavity by the piston, and the piston rod is located in the second cavity and fixed to the locomotive body. The brake comprises a communicating pipe, a friction block and an annular air bag fixed to the outer side of the friction block, the friction block is fixed to a rotating shaft of the front wheel, and the communicating pipe is arranged between the air bag and the s